mega-linter-runner: force platform linux/amd64

[nvuillam]

Fixes #2427

[nvuillam]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ BASH	bash-exec	6		0	0.03s
✅ BASH	shellcheck	6		0	0.16s
✅ BASH	shfmt	6	0	0	0.49s
✅ COPYPASTE	jscpd	yes		no	3.3s
✅ DOCKERFILE	hadolint	114		0	19.81s
✅ JSON	eslint-plugin-jsonc	21	0	0	2.64s
✅ JSON	jsonlint	19		0	0.24s
✅ JSON	v8r	21		0	14.27s
⚠️ MARKDOWN	markdownlint	309	0	230	7.26s
✅ MARKDOWN	markdown-link-check	309		0	6.04s
✅ MARKDOWN	markdown-table-formatter	309	0	0	22.2s
✅ OPENAPI	spectral	1		0	1.8s
⚠️ PYTHON	bandit	183		47	4.28s
✅ PYTHON	black	183	0	0	4.84s
✅ PYTHON	flake8	183		0	3.71s
✅ PYTHON	isort	183	0	0	0.94s
✅ PYTHON	mypy	183		0	8.76s
✅ PYTHON	pylint	183		0	14.66s
⚠️ PYTHON	pyright	183		250	21.0s
✅ REPOSITORY	checkov	yes		no	36.99s
✅ REPOSITORY	git_diff	yes		no	0.45s
✅ REPOSITORY	secretlint	yes		no	15.53s
✅ REPOSITORY	trivy	yes		no	35.6s
✅ SPELL	cspell	745		0	28.97s
✅ SPELL	misspell	566	0	0	1.15s
✅ XML	xmllint	3	0	0	0.47s
✅ YAML	prettier	81	0	0	3.45s
✅ YAML	v8r	23		0	67.02s
✅ YAML	yamllint	82		0	1.31s

See detailed report in MegaLinter reports

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